"Request scheme 'chrome-extension' is unsupported" occasionally appearing in debug console

[HowardWolosky]

Describe the bug
I am using the "Offline copy with Backup offline page" service worker, and occasionally I am seeing the error message of "Request scheme 'chrome-extension' is unsupported" in the debug console output.

To Reproduce
I'm not sure if this is because of specific extensions I have installed in my browser, so it's harder to be explicit here in repro steps. I tend to see it when I first load the site and then hit F5/Refresh. That refresh tends to see it in the debug console, but not usually the first load.

Expected behavior
No error messages stemming from the pre-canned service workers.

Desktop (please complete the following information):

• OS: Windows 10.0.18362.592
• Browser: Edge Dev
• Version 81.0.389.2

Additional context
I found another service worker on GitHub with the same problem, and in that issue someone suggested a fix. I tried that fix out and it appears to work for me. I'll submit a PR that implements that fix in these service workers for your consideration.

madskristensen/WebEssentials.AspNetCore.ServiceWorker/issues/66

[JudahGabriel]

@jgw96 will this be fixed with the new service workers?